<template>
  <div :class="className" :style="{ height: height, width: width }" />
</template>

<script>
import * as echarts from "echarts";

export default {
  props: {
    className: {
      type: String,
      default: "chart",
    },
    headTitle: {
      type: String,
      default: "chart",
    },
    width: {
      type: String,
      default: "100%",
    },
    height: {
      type: String,
      default: "190px",
    },
    autoResize: {
      type: Boolean,
      default: true,
    },
    xData: {
      type: Array,
      required: true,
    },
    yData: {
      type: Array,
      required: true,
    },
    unit: {
      type: String,
      default: "条",
    },
    color: {
      type: String,
      default: "#239DD2",
    },
  },
  data() {
    return {
      chart: null,
    };
  },
  watch: {
    yData: {
      deep: true,
      handler(val) {
        this.setOptions(this.unit);
      },
    },
  },
  mounted() {
    window.addEventListener("resize", this.resizeHandler);
    this.$nextTick(() => {
      this.initChart();
    });
  },
  beforeDestroy() {
    window.removeEventListener("resize", this.resizeHandler);
    if (!this.chart) {
      return;
    }
    this.chart.dispose();
    this.chart = null;
  },
  methods: {
    resizeHandler() {
      this.chart.resize();
    },
    initChart() {
      this.chart = echarts.init(this.$el);
    },
    setOptions(unit) {
      this.chart.setOption({
        grid: {
          left: 0,
          right: 0,
          bottom: 20,
          top: 35,
          containLabel: true,
        },
        xAxis: {
          data: this.xData,
          type: "category",
          axisLabel: {
            color: "#636E78",
            fontWeight: 700,
          },
          axisTick: {
            show: false,
          },
          axisLine: {
            show: false,
          },
        },
        yAxis: {
          show: false,
          axisLine: {
            show: false,
          },
        },
        series: [
          {
            //name: title,
            type: "bar",
            data: this.yData,
            animationDuration: 2800,
            animationEasing: "cubicInOut",
            showBackground: true,
            backgroundStyle: {
              color: "#EFF8FF",
            },
            itemStyle: {
              barBorderRadius: 4,
              color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                { offset: 0, color: "#1D99EF" },
                { offset: 1, color: "#1DC9EF" },
              ]),
            },
            // emphasis: {
            //   itemStyle: {
            //     color: "#22AC38"
            //   },
            // },
            label: {
              //文本标签中数值的小数点精度
              show: true,
              color: "#6b6a6a",
              fontWeight: "blod",
              distance: 0,
              rotate: unit=='%'?30:0,
              verticalAlign: "middle",
              position: "inside",
              formatter: function (params) {
                return unit?`${params.value}${unit}`:params.value;
              },
            },
          },
        ],
      });
    },
  },
};
</script>
